Fireplace damper



G. A. MORRELL.

FIREPLACE DAMPER. APPLICATION FILED JAN. 18, 1922.

Patented Julyll,- 1922.

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I 922. 1,422A65. Patented July 11, 1922.

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\ STATES .PATE

T i Q w. nonen'iesor SEATTLE, wasnrne'ron.

FIREPLACE D MPER;

ap lication filed January 18,

To al l who mgit cancer/i: I y

Be it known that I, GLENN A. MoRRELL, a citizen of. the United States ofAmerica, and resident of the city of Seattle, in the county of King andState of Washington, have invented certain new and useful Improvementsin Fireplace Dampers, of which the following is a specification.

My invention relates to fireplace dampers. It comprises certain novelfeatures of con struction and combinations of parts which will behereinafter described and then particularly pointed out in the claims.

The object of my invention has been to produce a damper of simple designwhich may be cheaply constructed, which will be durable in use andsimple and easy to operate.

In the accompanying drawings I have shown my invention in its preferredform of construction.

Figure 1 shows the damper in sectional elevation.

Figure 2 is a top plan view of the damper showing the damper plateraised.

Figure 3 shows in perspective a half length of the damper, the damperplate and its supporting bar being in section.

In the drawings 1 represents the chimney flue. The damper plate 2 ispivoted at one side of the throat of the chimney so as to swingupwardly. As a practical method of installing the damper, it may bepivoted to a bar 3 which is preferably of an L-shape in cross sectionand serves as an angle bar or support for the masonry at the top of thefireplace opening. This should be of such length that its ends haveample support upon the masonry at opposite ends of the fireplaceopening.

Projecting rearwardly from the masonry, just above the fireplace openingand preferably at about the center of the length of said opening is aratchet bar 4. This has ratchet teeth 40 on its upper edge and alsopreferably a return bend or hook 41 at its rearward end.

Pivotally secured to the lower side of the dam er plate 2 is an arm 5.This arm has a ho t 49 which is adapted to engage with the notches-40 ofthe ratchet bar 4 so as to support the damper plate in adjustedpositions. In the position shown in Figures 1 and 3 the damper isentirely closed. In such position the part 50 of the lever 5Specification of Let t e t v Patented July 11, 1922. 1922. Serial No.530,034.

which engages withthe; ratchet bar 4.. and whlchgis shown'asiarolleixjournaled on a bQltgA-9, engages with the outermost of saidnotches 40. It also, in this position, extends under the return hook 41and prevents the possibility of swinging the arm 5 outwardly so as todisengage it from the ratchet bar.

The arm 5 extends downwardly to such a point that it may be seen andmanipulated through the fireplace opening. It is also preferablyprovided with a loop as 51 so that it may be conveniently engaged by ahook formed on the end of a poker or other bar. To prevent displacementof the arm 5 from the ratchet bar 4 it may be provided with a slot 52 ofsuch size as to accommodate the ratchet bar. This slot is passed overthe ratchet bar and the arm 5 is thus held in position.

The closed position of the damper plate is shown in Figures 1 and 3. Toraise the damper the arm 5 is engaged and pulled forwardly. This causesthe part 50 which engages with the upper edge of the ratchet bar toslide up the toothed upper surface of the bar 4. The bar 5 may bestopped in engagement with any one of the notches 40. As the arm 5proceeds forwardly relative to the bar 4. the damper is held in thesuccessively higher positions by the engagement of the part 50 withsuccessive notches 40. In its uppermost position the damper plate isheld substantially in vertical position. To lower the damper it is onlynecessary to push the arm 51 towards the rear. The bar will slide downthe upper surface of the ratchet bar 4. The notches 40 are purposelymade such that the application of a little force rearwardly to the bar 5will cause it to slide out of the notches and downward.

What I claim as my invention is:

1. A. fireplace damper comprising a hinged damper plate, a fixed ratchetbar and an arm hinged to the damper plate outwardly from its pivot andadapted to engage the ratchet bar to hold the damper in raisedpositions.

2. A fireplace damper as in claim 1 in which the ratchet bar has aterminal hook adapted to prevent displacement of the hinged arm.

3. A fireplace damper comprising an angle section beam extending alongthe lintel of the fireplace opening, a damper plate hinged at the upperedge of the inner vertical Web of said beam, a ratchet bar extendingrearwardly from said inner vertical web and an adjusting bar hinged tothe damper plate outwardly from its pivot and adapted to engage theratchet bar to hold the damper plate in adjusted positions.

4. A fireplace damper comprising a damper plate hinged at one side ofthe fireplace throat, a ratchet arm toothed upon its upper edgeextending crosswise of the throat and an adjusting arm pivoted to thedamper plate outwardly from its pivot and adapted'to engage the ratchetarm to hold the damper in adjusted position.

5. A fireplace damper as in claim 4 in which the'adjusting arm has aslot for the reception of the ratchet arm.

6. A fireplace damper as in claim 4; in which the adjusting arm isslotted to receive the ratchet arm and is provided at its outer end Withmeans for preventing removal of the adjusting armtherefrom.

Signed at Seattle, King County, Washington, this 7th day of January,1922. V

GLENN A. MORRELL.

